The payment and the reminder have probably crossed, but check this briefly to be sure.
Go to our portal at www.portal.mybeppo.ch and enter the reference number and license plate (visible on the invoice/reminder).
If you no longer have any payment options below and it says "The invoice has been paid", everything is fine and you can destroy the reminder.
If this is not the case, please contact us and send us proof of payment.
We will check the facts and get back to you. Please do not forget to send us a reference number or the license plate number.